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8XC251SA, SB, SP, SQ USER’S MANUAL
A-20
MOV
DRk,dir8 Dir addr to dword reg 4 6 3 5
DRk,dir16 Dir addr (64K) to dword reg 5 6 4 5
Rm,dir8 Dir addr to byte reg 4 3 (3) 3 2 (3)
WRj,dir8 Dir addr to word reg 4 4 3 3
Rm,dir16 Dir addr (64K) to byte reg 5 3 4 2
WRj,dir16 Dir addr (64K) to word reg 5 4 4 3
Rm,@WRj Indir addr (64K) to byte reg 4 2 3 2
Rm,@DRk Indir addr (16M) to byte reg 4 4 3 3
WRjd,@WRjs Indir addr(64K) to word reg 4 4 3 3
WRj,@DRk Indir addr(16M) to word reg 4 5 3 4
dir8,Rm Byte reg to dir addr 4 4 (3) 3 3 (3)
dir8,WRj Word reg to dir addr 4 5 3 4
dir16,Rm Byte reg to dir addr (64K) 5 4 4 3
dir16,WRj Word reg to dir addr (64K) 5 5 4 4
@WRj,Rm Byte reg to indir addr (64K) 4 4 3 3
@DRk,Rm Byte reg to indir addr (16M) 4 5 3 4
@WRjd,WRjs Word reg to indir addr (64K) 4 5 3 4
@DRk,WRj Word reg to indir addr (16M) 4 6 3 5
dir8,DRk Dword reg to dir addr 4 7 3 6
dir16,DRk Dword reg to dir addr (64K) 5 7 4 6
Rm,@WRj+dis16 Indir addr with disp (64K) to byte reg 5 6 4 5
WRj,@WRj+dis16 Indir addr with disp (64K) to word reg 5 7 4 6
Rm,@DRk+dis24 Indir addr with disp (16M) to byte reg 5 7 4 6
WRj,@DRk+dis24 Indir addr with disp (16M) to word reg 5 8 4 7
@WRj+dis16,Rm Byte reg to Indir addr with disp (64K) 5 6 4 5
Table A-24. Summary of Move Instructions (Continued)
Move (2) MOV <dest>,<src> destination ← src opnd
Move with Sign Extension MOVS <dest>,<src> destination ← src opnd with sign extend
Move with Zero Extension MOVZ <dest>,<src> destination ← src opnd with zero extend
Move Code Byte MOVC <dest>,<src> A ← code byte
Move to External Mem MOVX <dest>,<src> external mem ← (A)
Move from External Mem MOVX <dest>,<src> A ← source opnd in external mem
Mnemonic <dest>,<src> Notes
Binary Mode Source Mode
Bytes States Bytes States
NOTES:
1. A shaded cell denotes an instruction in the MCS
®
51 architecture.
2. Instructions that move bits are in Table A-26 on page A-23.
3. If this instruction addresses an I/O port (P
x
,
x
= 0–3), add 1 to the number of states.
4. External memory addressed by instructions in the MCS 51 architecture is in the region specified by
DPXL (reset value = 01H). See section 3.1.1, “Compatibility with the MCS® 51 Architecture.”